Service manual

SERVICE MANUAL WG-xxG Series Gas Griddles SERVICE PAGE 4-5
THERMOSTAT CONTACT TESTING
Testing the thermostat for open contacts can be
accomplished by simply placing a jumper wire
between test point 1 and 3 on the gas valve terminal
block. When these two points are connected, the gas
valve should open and the main burner should light
provided the pilot flame has been established prior to
placing the jumper on the test points. (See the
drawing below).
One note on possible problems that may be
encountered: Grease contamination build-up on the
terminal block, a short circuit between any wire
(Thermostat or Thermopile) connected to the gas
valve to the case ground/frame of the griddle will
cause the gas valve to shut down and cut off the gas
flow on the valve connected to the thermostat or
thermopile related to that gas valve.
THERMOSTAT REPLACEMENT
Two similar types of thermostats have been used in
this series of gas griddles.
Early production units used V*' push-on terminal lugs,
all current production units now use a ring terminal
lug, a new screw type terminal and white ceramic
housing containing a reed switch is now used in the
thermostat for a more reliable control of the mV.
signals from the Thermopile to the gas valve.
When servicing units with the push-on terminals,
converting to the new style screw on terminals will
ensure maximum reliability.
When replacing the thermostat use only a genuine
O.E.M. Part! For safety, proper operation, efficiency,
and preserving the factory Warranty, only O.E.M.
Parts should be used when servicing the griddle.
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